We design on our huge desktop screens inside of a smaller mobile “cut-out” with our drawing tool of choice. We create “prototypes,” checking to see what our designs look like on a phone with a “live preview link,” or through a “mirror app.” Then we test with some users. Want to make changes? Go back to your desktop and start the process over again. Eventually, we’ll work in sprints alongside a dev team, which now needs to write code and start building the actual product.